How to randomize particle effects along a curve guide?
As far as i experimented with my project, I couldn't find a definite solution. However,I was able to bypass the problem. I aligned the normals of the emitter along one of the axis, then with required level Brownian Motion set, I increased the Normal velocity of the particle system. Later I baked the Particle System, however this step was of my preference.
Similar results can also be achieved by setting a Particle System with the necessary -- Brownian Motion and Normal Velocity -- settings along with a Force Field of negative strength. Note that both the Particle System and Force Field have to exist on the same Layer. Also, a Force Field affects all particle systems present on the layer. Therefore, while using multiple particle systems place each of them on a different Layer if you don't want the Force Field affect them too.